Custom headers not working

I’m trying to get custom headers to work. The example in the documentation doesn’t seem to work. And returns a not found on the method.

this.imageLoaderConfig.setHttpRequestOptions({
  headers: {
    Authorization: 'Basic dGVzdHVzZXJuYW1lOnRlc3RwYXNzd29yZA=='
  }
});

In the code I’m seeing setHttpHeaders is available and that expecting an HttpHeader object.
Tried the example below but not seeing a header.

import { HttpHeaders } from '@angular/common/http';

let headers = new HttpHeaders();
    headers.append('Authorization', 'Bearer blablah-blah');
    imageLoaderConfig.setHttpHeaders(headers);
    imageLoaderConfig.enableDebugMode();

[markrinkel]

Yes, that works!

Thank you.

[nylz]

constructor of app.component.ts:

constructor(
    imageLoaderConfig: ImageLoaderConfigService,
    private splashScreen: SplashScreen,
    private statusBar: StatusBar,
    private pushyInitializer: PushyInitializerService,
    private platform: Platform,
    private router: Router,
    private httpClient: HttpClient,
    private domSanitizer: DomSanitizer
  ) {
    imageLoaderConfig.setConcurrency(10);
    imageLoaderConfig.useImageTag(true);
    imageLoaderConfig.enableSpinner(true);
    imageLoaderConfig.setSpinnerName('crescent');
    imageLoaderConfig.setSpinnerColor('primary');
    imageLoaderConfig.setFallbackUrl('assets/images/image_placeholder.png');
    imageLoaderConfig.enableFallbackAsPlaceholder(false);
    const headers = new HttpHeaders().set('Authorization', 'Bearer blablabla')
                .set('DeviceToken', 'blablabla');
    imageLoaderConfig.setHttpHeaders(headers);
    imageLoaderConfig.enableDebugMode();

  }

and in the template of the component / page:

<img-loader [src]="getImageUrl(object)" (click)="show_detail(object, i)"></img-loader>

then the request header to http://localhost:8080/Application_www/images/web/boxthumb/2039 looks like:

Host: localhost:8080
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Firefox/60.0
Accept: */*
Accept-Language: de-DE,en-US;q=0.7,en;q=0.3
Accept-Encoding: gzip, deflate
Referer: http://localhost:8100/main/overview
Cookie: JSESSIONID=C64540999B1BF4A7364A6EC555BA89B3
DNT: 1
Connection: keep-alive
Pragma: no-cache
Cache-Control: no-cache